The wannabe rapper - who already has a girl and a boy with former partner Shar Jackson - is expecting a second child with wife Britney Spears.

A friend of the couple said: "Kevin would love another girl."

Britney, 24, revealed that she is pregnant again live on US TV on Tuesday (09.05.06). She told 'The Tonight Show' host David Letterman: "Don't worry, Dave, it's not yours."

He replied: "Oh. Well, I think that's good news for both of us." However Britney, who walked onstage unannounced after a commercial break, refused to give any details about a due date, or talk about her relationship with Kevin.

A show insider told America's People magazine: "Her representative called and said Britney wanted to be on the show and this is what she'd announce. We were psyched." Britney already has one son, Sean Preston, with the 28-year-old - who left Jackson and their children for the singer.

Sean Preston was born last September - almost exactly a year after the 'Toxic' singer and wannabe-rapper tied the knot. The impending birth means Britney will have to delay her pop comeback again. Meanwhile, Kevin's debut album, 'Playing with Fire', is due to be released in August.